I've been unable to log on for a while. My progress is slower than anticipated, there are already a few other guys doing this swap, who are telling about it on www.ls1tech.com
So far, noone is offering mounts or anything, and so far, noone is even commenting on which headers or exhaust manifolds, and which oilpan.
I'm trying to get my hands on a used '98-'02 Z28/TransAm LS1 pan, because new ones are $170.
Using this pan may require notching the crossmember, or a bit of hammering on the firewall, or both.
AutoKraft makes a pan that's rumored to fit, but it's $400, and might interfere with fitting an exhaust system.
The H3-Alpha oilpan would be an easy fit, but like the truck pan, would hang too low.
I'm also trying to get an '05-'06 'vette Ls2 pan for my LSx Fiero, but if I can get one, I'll also try it in here.
I have a lead on a T5 from a '92 Z28, and admittedly it's not very strong, but it is small and light, and places like Astro Perf. and G-Force can make it strong enough for 500 ft-lbs input torque.
The best alternative is the Tremec TKO600, but that runs around $1900 new. A used '88-up T5 with a kit is cheaper, lighter and smaller. Plus Nissan installed some T5s in some Z31s, so mounting and connecting the T5 should be easier. It may be possible to use certain stock driveshafts, while the tkO600 requires a different yoke on the front of the driveshaft.
Sorry no helpful pics yet.